Govt Exams Mock Test FREE | Online Quiz Competition

Q1. A delta-connected balanced three-phase load is supplied from a three-phase, 400V supply. The line current is 20A and the power taken by the load is 10 kw. Find the power factor.

0.62

0.52

0.72

0.82

Q2. Two waves of same amplitude and frequency with a phase difference of \(\frac{\pi}{2}\) and travelling in same direction are superimposed each other, the maximum amplitude of the resultant wave is

\(A\sqrt 2\)

\(2A\)

\(\frac{A}{2}\)

\(A\)

Q3. Which of the following is not a source of reactive power?

Generators

Reactors

Resistors

Capacitors

Q4. Which linear circuit can be used as an equivalent circuit for a single voltage source and a series resistance?

Nortan’s equivalent

Thevenin equivalent circuit

Maximum power equivalent circuit

Reciprocal power circuit

Q5. An air gap is usually inserted in magnetic circuit so as to

prevent saturation

increase in m.m.f

increase in flux

increase in inductance

Q6. If the time constant of the serie RL circuit with \(R = 250 \:\Omega\) is 1 sec, find the required value of self-inductance.

500 H

50 H

250 H

100 H

Q7. The characteristic equation of a control system is given by \(s^3+2s^2+3s+4=0\). The number of poles in the right-half of the s-plane is:

0

1

2

3

Q8. The eigenvalues of the system matrix in state-space representation determine the system's:

Settling time

Natural frequency

Damping ratio

Stability

Q9. A system is stable for

Gain margin and Phase margin both positive.

Gain margin and Phase margin both negative.

Gain margin positive, Phase margin negative.

Phase margin negative.

Q10. The Phase of lead compensator of the system \(G(s) = \frac{(s+a)}{(s+b)}\) is at its maximum at:

\(ab\)

\(\sqrt {\frac{a}{b}}\)

\(\frac{a}{b}\)

\(\sqrt{ab}\)

Quiz

Year 2024

February
Week # 1 Quiz 3

Q1. A delta-connected balanced three-phase load is supplied from a three-phase, 400V supply. The line current is 20A and the power taken by the load is 10 kw. Find the power factor.

Q2. Two waves of same amplitude and frequency with a phase difference of \(\frac{\pi}{2}\) and travelling in same direction are superimposed each other, the maximum amplitude of the resultant wave is

Q3. Which of the following is not a source of reactive power?

Q4. Which linear circuit can be used as an equivalent circuit for a single voltage source and a series resistance?

Q5. An air gap is usually inserted in magnetic circuit so as to

Q6. If the time constant of the serie RL circuit with \(R = 250 \:\Omega\) is 1 sec, find the required value of self-inductance.

Q7. The characteristic equation of a control system is given by \(s^3+2s^2+3s+4=0\). The number of poles in the right-half of the s-plane is:

Q8. The eigenvalues of the system matrix in state-space representation determine the system's:

Q9. A system is stable for

Q10. The Phase of lead compensator of the system \(G(s) = \frac{(s+a)}{(s+b)}\) is at its maximum at:

Quiz

Year 2024

July Week # 1 Expire on 31 Jul 2024

July Week # 2 Expire on 07 Aug 2024

July Week # 3 Expire on 14 Aug 2024

July Week # 4 Expire on 21 Aug 2024

February Week # 1 Quiz 3

Q1. A delta-connected balanced three-phase load is supplied from a three-phase, 400V supply. The line current is 20A and the power taken by the load is 10 kw. Find the power factor.

Q2. Two waves of same amplitude and frequency with a phase difference of \(\frac{\pi}{2}\) and travelling in same direction are superimposed each other, the maximum amplitude of the resultant wave is

Q3. Which of the following is not a source of reactive power?

Q4. Which linear circuit can be used as an equivalent circuit for a single voltage source and a series resistance?

Q5. An air gap is usually inserted in magnetic circuit so as to

Q6. If the time constant of the serie RL circuit with \(R = 250 \:\Omega\) is 1 sec, find the required value of self-inductance.

Q7. The characteristic equation of a control system is given by \(s^3+2s^2+3s+4=0\). The number of poles in the right-half of the s-plane is:

Q8. The eigenvalues of the system matrix in state-space representation determine the system's:

Q9. A system is stable for

Q10. The Phase of lead compensator of the system \(G(s) = \frac{(s+a)}{(s+b)}\) is at its maximum at:

Record & Track Your Performance

February
Week # 1 Quiz 3